Setting EnableEmbeddedSkins="false" in RadGrid when FilterType="HeaderContext" is not applied to the ListBox (filterCheckList) hence the following error is thrown:
A temporary workaround is to disable the Embedded skins for the ListBox Control manually in the code-behind:
protected void Page_PreRender(object sender, EventArgs e)
{
var lb = RadGrid1.FindControl("filterCheckList") as RadListBox;
if (lb != null)
{
lb.EnableEmbeddedSkins = false;
}
}
Kind regards,
Doncho
Progress Telerik